On Fri, Feb 26, 2010 at 04:14:08PM +0100, Peter Zijlstra wrote: > On Fri, 2010-02-26 at 16:53 +0200, Avi Kivity wrote: > > > If you give a full PMU to a guest it's a whole different dimension and quality > > > of information. Literally hundreds of different events about all sorts of > > > aspects of the CPU and the hardware in general. > > > > > > > Well, we filter out the bad events then. > > Which requires trapping the MSR access, at which point a soft-PMU is > almost there, right? The perfctl msrs need to be trapped anyway. Otherwise the guest could generate NMIs in host context. But access to the perfctr registers could be given to the guest. Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
